38453881 has 4 divisors (see below), whose sum is σ = 40715892. Its totient is φ = 36191872.

The previous prime is 38453879. The next prime is 38453927. The reversal of 38453881 is 18835483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22325625 + 16128256 = 4725^2 + 4016^2 .

It is a cyclic number.

It is not a de Polignac number, because 38453881 - 2¹ = 38453879 is a prime.

It is a super-2 number, since 2×38453881² = 2957401927924322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38453801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130980 + ... + 1131013.

It is an arithmetic number, because the mean of its divisors is an integer number (10178973).

Almost surely, 2^38453881 is an apocalyptic number.

It is an amenable number.

38453881 is a deficient number, since it is larger than the sum of its proper divisors (2262011).

38453881 is a wasteful number, since it uses less digits than its factorization.

38453881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262010.

The product of its digits is 92160, while the sum is 40.

The square root of 38453881 is about 6201.1193344428. The cubic root of 38453881 is about 337.5307874978.

The spelling of 38453881 in words is "thirty-eight million, four hundred fifty-three thousand, eight hundred eighty-one".